package net.carinae.dev.seduku.utils;

import java.util.Set;

/**
 * The operations that need to be performed on a sudoku digit.
 * 
 * @author Carlos Vara
 */
public interface SudokuDigit {

    /**
     * @return A set of all the available digits except for this one.
     */
    Set<? extends SudokuDigit> complement();
    
}
